9664321 has 2 divisors, whose sum is σ = 9664322. Its totient is φ = 9664320.

The previous prime is 9664309. The next prime is 9664339. The reversal of 9664321 is 1234669.

9664321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7230721 + 2433600 = 2689^2 + 1560^2 .

It is a cyclic number.

It is not a de Polignac number, because 9664321 - 2²¹ = 7567169 is a prime.

It is a Chen prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (9664621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4832160 + 4832161.

It is an arithmetic number, because the mean of its divisors is an integer number (4832161).

Almost surely, 2^9664321 is an apocalyptic number.

It is an amenable number.

9664321 is a deficient number, since it is larger than the sum of its proper divisors (1).

9664321 is an equidigital number, since it uses as much as digits as its factorization.

9664321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 9664321 is about 3108.7491053477. The cubic root of 9664321 is about 213.0053192115.

The spelling of 9664321 in words is "nine million, six hundred sixty-four thousand, three hundred twenty-one".